How does the low flue tempture affect the draft. I would think that if your flue tempture is lower you would need a larger flue to get the same draw. Most of the coal fired systems I have seen here have had what seemed to be a large flue or a forced air in take.

What kind of coal would you use ? The "soft" coal we have in western PA has a high sulfer content and makes yellow smoke with a rotten egg smell. Not plesent if you live in a valley.


Ward